diff --git a/cloudinary-image-management-and-manipulation-in-the-cloud-cdn/php/class-media.php b/cloudinary-image-management-and-manipulation-in-the-cloud-cdn/php/class-media.php
index 79deba678..84e49ac7f 100644
--- a/cloudinary-image-management-and-manipulation-in-the-cloud-cdn/php/class-media.php
+++ b/cloudinary-image-management-and-manipulation-in-the-cloud-cdn/php/class-media.php
@@ -1726,7 +1726,7 @@ public function get_upload_options( $attachment_id ) {
 	 */
 	public function maybe_overwrite_featured_image( $attachment_id ) {
 		$overwrite = false;
-		if ( $this->doing_featured_image && $this->doing_featured_image === $attachment_id ) {
+		if ( $this->doing_featured_image && $this->doing_featured_image === (int) $attachment_id ) {
 			$overwrite = (bool) $this->get_post_meta( get_the_ID(), Global_Transformations::META_FEATURED_IMAGE_KEY, true );
 		}
 
@@ -1740,7 +1740,7 @@ public function maybe_overwrite_featured_image( $attachment_id ) {
 	 * @param int $attachment_id The thumbnail ID.
 	 */
 	public function set_doing_featured( $post_id, $attachment_id ) {
-		$this->doing_featured_image = $attachment_id;
+		$this->doing_featured_image = (int) $attachment_id;
 		add_action( 'end_fetch_post_thumbnail_html', function () {
 			$this->doing_featured_image = false;
 		} );